Replace the old @atproto/lex-cli `lex gen-api` codegen (and its pile of sed hacks in the Makefile) with Bluesky's newer @atproto/lex `lex build`. Generator/build: - Root: drop @atproto/lex-cli, add @atproto/lex; js/streamplace depends on it at runtime (generated files import `l`, and the agent uses `Client`). - Rewrite the `js-lexicons` Makefile target to `lex build` against a merged lexicon dir (upstream atproto + streamplace overrides), with --clear --index-file. Excludes place.stream.live.subscribeSegments (a raw-bytes subscription message the typed-union codegen can't express; unused in JS). - Add scripts/gen-raw-lexicons.mjs to bundle the raw place.stream/games lexicon docs into `schemas` (the new tool doesn't emit that array, but a couple of consumers introspect it at runtime). streamplace package: - @atproto/lex is ESM-only, so make `streamplace` an ESM package (type: module, node16 resolution) and regenerate with .js import extensions. - StreamplaceAgent still extends @atproto/api Agent for OAuth + Bluesky, and now exposes `agent.client` (a @atproto/lex Client) built from the same session's did/fetchHandler. Drop the old PlaceNS + Lexicons wiring. - Re-author useful-types hydrated interfaces against the new .Main/view types. Consumers: - Adopt the new client idiom at all call sites: agent.place.stream.X.Y(...) -> agent.client.call(place.stream.X.Y, ...) (body returned directly, no .data); record CRUD on place.stream.* -> agent.client.create/get/put/delete/list. - Rewrite type refs from flat PlaceStreamXxx to the hierarchical place.* / games.* namespaces (.Record -> .Main), and guards to schema `.isTypeOf`/`.$isTypeOf`. - Bluesky (app.bsky.*) types and calls stay on @atproto/api. Tooling: - js/app tsconfig: moduleResolution bundler (reads @atproto/lex's exports map), with paths aliases for the exports-restricted packages whose historical deep imports Metro still resolves at runtime. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>